"The isolation between you and her is like the expansion of the sea."
"Even if it is like the expansion of the sea,
I will continue carrying gray mud and bricks, night and day
above the waters - and build a bridge."
"This bridge cannot be built even if it takes millions of years."
"Yet I am willing to work ceaselessly for decades.
I cannot only forlorn and depressed hope to reach the strange splendor of the other shore (1)
and spend like this the whole expansion of my life."
(1) "彼岸" (bǐàn), lit. "that shore", may refer to the Buddhist paramitas (https://en.wikipedia.org/wiki/P%C4%81ramit%C4%81), or rather to the passage towards Nibbana after dead, cf. the expression "到彼岸", lit. "go towards the other shore" (http://www.cbeta.org/result/normal/T44/1851_012.htm ; p0705b13-b24)